Mitsubishi FDT71VH - Page 55

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54
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'20 • PAC-SM-351
Remote control Indoor unit display Outdoor unit control PCB Outdoor inventer PCB
Location of trouble Description of trouble Repair method
Reference
page
Error code Red LED RUN light
TIMER
light
Red LED Green LED Yellow LED
Keeps
flashing
Keeps
flashing
ON
ON
Keeps
flashing
1-time flash
1-time flash
Keeps
flashing
Installation or operating
condition
• Higher outdoor heat exchanger temperature Repair
153
154
155
156
157
158
159
162
163
166
167
168
169
164・165
170・171
160・161
Outdoor heat exchanger
temperature thermistor
• Defective outdoor heat exchanger temperature sensor
Replacement of
temperature thermistor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor input
circuit)?
Replacement of PCB
5-time
flash
2-time
flash
Keeps
flashing
Installation or operating
condition
• Higher discharge temperature Repair
temperature sensor
• Defective discharge pipe temperature sensor
Replacement, repair of
temperature thermistor
Outdoor unit control PCB
*•
Defective outdoor unit control PCB (Defective temperature sensor input circuit)?
Replacement of PCB
Keeps
flashing
4-time
flash
7-time
flash
Keeps
flashing
5-time
flash
7-time
flash
Keeps
flashing
Keeps
flashing
1-time flash
Keeps
flashing
Outdoor heat exchanger
temperature thermistor
•
Defective outdoor heat exchanger temperature sensor , broken wire or poor
connector connection
Replacement, repair of
temperature thermistor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor input
Replacement of PCB
1-time flash1-time flash
Keeps
flashing
Outdoor air temperature
thermistor
• Defective outdoor air temperature sensor broken wire or poor connector
connection
Replacement, repair of
temperature thermistor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor input
Replacement of PCB
1-time flash
Keeps
flashing
Discharge pipe
temperature sensor
• Defective discharge pipe temperature sensor broken wire or poor connector
connection
Replacement, repair of
temperature thermistor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor input
circuit)?
Replacement of PCB
1-time flash
Keeps
flashing
Installation or operating
condition
• Rising high pressure (Operation of 63H1) • Service valve closing operation Repair
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective 63H input circuit)? Replacement of PCB
1-time flash
Keeps
flashing
6-time flash
Inverter PCB or radiator
fin
•
Power transistor overheat
Replacement of PCB
or Repair
ON
ON
4-time
flash
ON
ON
1-time flash1-time flash
Keeps
flashing
1-time flash
Outdoor unit control
PCB compressor
• Current cut (Anomalous compressor over-current) Replacement of PCB
Installation or operating
condition
• Service valve closing operation Repair
1-time flash
Keeps
flashing
Outdoor unit control PCB • Anomalous outdoor unit control PCB communication
Inverter PCB • Anomalous inverter PCB communication
Replacement of PCB
1-time flash
Keeps
flashing
Keeps
flashing
Outdoor fan motor • Anomalous outdoor fan motor Replacement, repair
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective motor input circuit)? Replacement of PCB
1-time flash
Keeps
flashing
Installation or operating
condition
• Low pressure error • Service valve closing operation Repair
Low pressure sensor
• Anomalous low pressure, broken wire of low pressure sensor or poor
connector connection
Replacement, repair of
sensor
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective sensor input circuit)?
Replacement of control
PCB
1-time flash
Keeps
flashing
6 - time flash
Inverter PCB • Anomalous inverter PCB Replacement of PCB
1-time flash
Keeps
flashing
Keeps
flashing
Suction pipe
temperature sensor
• Defective suction pipe temperature sensor, broken wire or poor connector
connection
Replacement, repair of
temperature thermistor
Outdoor unit control PCB *• Defective outdoor unit PCB (Defective sensor input circuit)?
Replacement of control
PCB
1-time flash
Keeps
flashing
Low pressure sensor • Defective low pressure sensor Replacement of sensor
Outdoor unit control PCB • Defective outdoor unit control PCB (Defective sensor input circuit)?
Replacement of control
PCB
1-time flash
Keeps
flashing
Operation status • Shortage in refrigerant quantity Repair
Installation status • Service valve closing operation
Service valve opening
check
5-time flash
Keeps
flashing
Stays OFF
Compressor,
inverter PCB
•Anomalous compressor startup Replacement
Note (1) * mark in the Description of trouble means that, in ordinary diagnosis, it cannot identify the cause definitely, and, if the trouble is repaired by replacing the part, it
is judged consequently that the replaced part was defective.
Indoor unit display panel Outdoor unit control PCB
Description of trouble Repair method
Error code Red LED RUN light TIMER light Red LED Green LED
Keeps flashing Stays OFF Keeps flashing • Communication error (Defective communication circuit on the main unit of SL2NA-E or SC-SL4-AE/BE) ete. Replacement
－ －
——
——
——
——
——
——
circuit)?
circuit)?
(iii) Option control in-use
2)
SRK series
Remote control Indoor unit display Outdoor unit control PCB Outdoor inventer PCB
Location of trouble Description of trouble Repair method
Reference
page
Error code Red LED RUN light
TIMER
light
Red LED Green LED Yellow LED
Keeps
flashing
Keeps
flashing
ON
ON
Keeps
flashing
1-time flash
1-time flash
Keeps
flashing
Installation or operating
condition
• Higher outdoor heat exchanger temperature Repair
153
154
155
156
157
158
159
162
163
166
167
168
169
164・165
170・171
160・161
Outdoor heat exchanger
temperature thermistor
• Defective outdoor heat exchanger temperature sensor
Replacement of
temperature thermistor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor input
circuit)?
Replacement of PCB
5-time
flash
2-time
flash
Keeps
flashing
Installation or operating
condition
• Higher discharge temperature Repair
temperature sensor
• Defective discharge pipe temperature sensor
Replacement, repair of
temperature thermistor
Outdoor unit control PCB
*•
Defective outdoor unit control PCB (Defective temperature sensor input circuit)?
Replacement of PCB
Keeps
flashing
4-time
flash
7-time
flash
Keeps
flashing
5-time
flash
7-time
flash
Keeps
flashing
Keeps
flashing
1-time flash
Keeps
flashing
Outdoor heat exchanger
temperature thermistor
•
Defective outdoor heat exchanger temperature sensor , broken wire or poor
connector connection
Replacement, repair of
temperature thermistor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor input
Replacement of PCB
1-time flash1-time flash
Keeps
flashing
Outdoor air temperature
thermistor
• Defective outdoor air temperature sensor broken wire or poor connector
connection
Replacement, repair of
temperature thermistor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor input
Replacement of PCB
1-time flash
Keeps
flashing
Discharge pipe
temperature sensor
• Defective discharge pipe temperature sensor broken wire or poor connector
connection
Replacement, repair of
temperature thermistor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor input
circuit)?
Replacement of PCB
1-time flash
Keeps
flashing
Installation or operating
condition
• Rising high pressure (Operation of 63H1) • Service valve closing operation Repair
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective 63H input circuit)? Replacement of PCB
1-time flash
Keeps
flashing
6-time flash
Inverter PCB or radiator
fin
•
Power transistor overheat
Replacement of PCB
or Repair
ON
ON
4-time
flash
ON
ON
1-time flash1-time flash
Keeps
flashing
1-time flash
Outdoor unit control
PCB compressor
• Current cut (Anomalous compressor over-current) Replacement of PCB
Installation or operating
condition
• Service valve closing operation Repair
1-time flash
Keeps
flashing
Outdoor unit control PCB • Anomalous outdoor unit control PCB communication
Inverter PCB • Anomalous inverter PCB communication
Replacement of PCB
1-time flash
Keeps
flashing
Keeps
flashing
Outdoor fan motor • Anomalous outdoor fan motor Replacement, repair
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective motor input circuit)? Replacement of PCB
1-time flash
Keeps
flashing
Installation or operating
condition
• Low pressure error • Service valve closing operation Repair
Low pressure sensor
• Anomalous low pressure, broken wire of low pressure sensor or poor
connector connection
Replacement, repair of
sensor
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective sensor input circuit)?
Replacement of control
PCB
1-time flash
Keeps
flashing
6 - time flash
Inverter PCB • Anomalous inverter PCB Replacement of PCB
1-time flash
Keeps
flashing
Keeps
flashing
Suction pipe
temperature sensor
• Defective suction pipe temperature sensor, broken wire or poor connector
connection
Replacement, repair of
temperature thermistor
Outdoor unit control PCB *• Defective outdoor unit PCB (Defective sensor input circuit)?
Replacement of control
PCB
1-time flash
Keeps
flashing
Low pressure sensor • Defective low pressure sensor Replacement of sensor
Outdoor unit control PCB • Defective outdoor unit control PCB (Defective sensor input circuit)?
Replacement of control
PCB
1-time flash
Keeps
flashing
Operation status • Shortage in refrigerant quantity Repair
Installation status • Service valve closing operation
Service valve opening
check
5-time flash
Keeps
flashing
Stays OFF
Compressor,
inverter PCB
•Anomalous compressor startup Replacement
Note (1) * mark in the Description of trouble means that, in ordinary diagnosis, it cannot identify the cause definitely, and, if the trouble is repaired by replacing the part, it
is judged consequently that the replaced part was defective.
Indoor unit display panel Outdoor unit control PCB
Description of trouble Repair method
Error code Red LED RUN light TIMER light Red LED Green LED
Keeps flashing Stays OFF Keeps flashing • Communication error (Defective communication circuit on the main unit of SL2NA-E or SC-SL4-AE/BE) ete. Replacement
－ －
——
——
——
——
——
——
circuit)?
circuit)?
2) SRK series
1) FDT, FDTC, FDU, FDUM, FDE series
Indoor unit control PCB Outdoor unit control PCB
Description of trouble Repair method
Error code Red LED Red LED Green LED Red LED Green LED
Keeps flashing Stays OFF Keeps flashing Stays OFF Keeps flashing • Communication error (Defective communication circuit on the main unit of SC-SL2NA-E or SC-SL4-AE/BE) ete. Replacement